MAPT and frontotemporal dementia: Non-synonymous or splice-site variants in other genes relevant to FTD (MAPT, GRN, TARDBP, FUS, TBK1, CHMP2B, and SQSTM1) as well as those relevant to AD (APP, PSEN1, and PSEN2) [1] which were either rare (< 1% minor allele frequency) or absent in population databases were not detected on the basis of the whole-exome sequencing data [15].